PURPOSE: An open circuit malfunction diagnosing device of a three-phase AC/DC PWM(Pulse Width Modulation) convertor and a method thereof are provided to accurately detect a phase in which malfunction occurs in the operation of a system. CONSTITUTION: A current converting unit(100) converts a 3-phase current value into a 2-phase rest frame current value. A malfunction diagnosing unit(200) monitors changes of a current vector position angle. The malfunction diagnosing unit detects the malfunction of an open circuit and a phase in which the malfunction occurs. The changes of the current vector position angle are obtained from the converted 2-phase rest frame current value. [Reference numerals] (200) Malfunction diagnosing unit
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机译:目的:提供一种三相AC / DC PWM(脉宽调制)转换器的开路故障诊断装置及其方法,以准确地检测在系统的操作中发生故障的相位。构成:电流转换单元(100)将三相电流值转换成两相静止框架电流值。故障诊断单元(200)监视当前矢量位置角度的变化。故障诊断单元检测开路的故障和发生故障的阶段。从转换后的两相静止框架电流值中获得电流矢量位置角的变化。 [参考数字](200)故障诊断单元
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